Flame Scanning Device Using Segmented Detectors
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Solution Overview
Problem
Current flame scanning devices are costly due to their complexity and high technical sophistication, while simpler devices lack sensitivity and reliability in characterizing flame parameters like stoichiometry and temperature.
Innovation Solution
A flame scanning device with at least two individual detectors, each with specific central detection wavelengths and narrow observation windows, monitoring only regions of interest in the spectrum where chemiluminescence of species is expected, without the need for a dispersive element, and using a taper element to broaden the intensity distribution for efficient light detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard techniques with sophisticated detection methods are used, then reliability and measurement precision are improved, but device complexity and cost increase
Solution Approach 1:
The spectrum is segmented into multiple discrete wavelength ranges, with each detector assigned to a specific range. This segmentation allows the system to achieve reliable measurements across the full spectrum using simple, inexpensive detectors rather than requiring a single complex sophisticated detection system.
Solution Approach 2:
Multiple detectors with different wavelength sensitivities are combined in a single device, allowing one system to perform multiple measurement functions simultaneously. The device can detect various flame parameters (temperature, composition, stability) using different detectors working together, achieving versatility without requiring multiple separate specialized instruments.
2Measurement precision
If multiple detectors with specific wavelength ranges are used, then measurement precision for flame parameters is improved, but device complexity increases
Solution Approach 1:
The detection task is segmented across multiple detectors, each responsible for a specific wavelength range. This allows precise measurement of different flame parameters (e.g., temperature from certain wavelengths, composition from others) while keeping each individual detector simple and the overall system manageable.
Solution Approach 2:
The system exploits changes in spectral parameters (wavelength intensity distributions) to extract multiple flame parameters simultaneously. By monitoring how radiation intensity varies across different wavelength ranges, the system can determine temperature, stoichiometry, and flame stability without requiring complex detection hardware for each parameter.
3Adaptability or versatility
If the full contiguous spectrum is monitored, then comprehensive flame characterization is achieved, but device complexity and cost increase
Solution Approach 1:
Instead of monitoring the full contiguous spectrum with a single complex system, the approach segments the spectrum into discrete wavelength ranges and assigns specific detectors to each segment. This achieves comprehensive flame characterization through coordinated simple detectors rather than one complex system.
Solution Approach 2:
Multiple detectors with different spectral responses are merged into a single integrated flame scanning device. By combining the outputs of these detectors and analyzing the combined spectral information, the system achieves comprehensive flame characterization that would require multiple separate instruments otherwise.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device provides high sensitivity and reliability in characterizing flame parameters, including temperature and stoichiometry, while being cost-effective and robust, capable of distinguishing between different fuel types and flame conditions.
Implementation Method 1
a flame sensor element for the detection of radiation and conversion into electrical signals
Implementation Method 2
a radiation collection and transmission element for collecting flame radiation and transmitting it to detection elements
Implementation Method 3
using a taper element to broaden the intensity distribution for efficient light detection
Data Source
Figure 1a~1e
Figure 2a~2b
Figure 2c
AI summary
A flame scanning device for monitoring a flame is disclosed. The device comprises a radiation collection and transmission element (1, 2, 3, 4, 8) for collecting flame radiation and transmitting it to detection elements (5, 9), a flame sensor element (9) for the detection of radiation and conversion into electrical signals, and an evaluation unit (6) for the conversion of the electrical signals into flame parameters. A particularly tailored and reliable and at the same time cost efficient device can be provided if the flame sensor element (9) comprises at least two individual detectors (11-19) each with individual central detection wavelength and a width of observation window (20-24), wherein the individual central detection wavelength and the width of observation window (20-24) are not overlapping and are covering individual regions of interest of the spectrum of radiation.